2-Amino-4-methylpyridinium 3-hydroxybenzoate

Abstract: In the title salt, C6H9N2+·C7H5O3-, the anion is essentially planar, with a dihedral angle of 2.72 (17)° between the benzene ring and the carboxylate group. In the crystal, the anions are connected by O-HO hydrogen bonds, forming a 41 helical chain along the c axis. The protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxylate O atoms of the anion via a pair of N-HO hydrogen bonds with an R22(8) ring motif. The ion pairs are further connected via another N-HO hydrogen bond, resulting in a three-dimensional network.